We all know that excessive stress is a health hazard. What is less talked about are the effects of burnout on business performance. Stress makes people nearly three times as likely to leave their jobs, temporarily impairs strategic thinking, and dulls creative abilities. Burnout, then, is a threat to your bottom line, one that costs the U.S. more than $300 billion a year in absenteeism, turnover, diminished productivity, and medical, legal, and insurance costs.